Senior Mobile Engineer (React Native)

Job Description

Roles & ResponsibilitiesAbout KingoMartKingoMart is a B2B e-commerce marketplace connecting suppliers and business buyers. Our platform today consists of a customer storefront (Next.js + React + TypeScript), an internal admin panel (React + TypeScript), and a FastAPI + PostgreSQL backend that publishes a typed OpenAPI contract. Everything user-facing is TypeScript, and mobile will be too.The roleYou will be our first and founding mobile engineer. You own the mobile architecture end to end: you will build and ship our customer storefront app for Android and iOS (React Native + Expo, TypeScript), and later a second app for our suppliers. The monorepo, typed API client, and build-service decisions (Expo EAS) are already in place you take them from skeleton to shipped product, and you own every release that follows.This is a high-ownership role: you set the technical standards, the release process, and the quality bar that the whole mobile codebase will live with for years.What you will doBuild and ship the KingoMart storefront app (catalog, search, cart, checkout, orders, account) to both the App Store and Google Play.Own the mobile architecture: navigation, state management, offline/caching strategy, deep linking, and push notifications documented in ADRs.Own release engineering: EAS builds, store submissions, staged rollouts, over-the-air updates, crash monitoring, and rollback strategy.Integrate with our FastAPI backend through the shared OpenAPI-generated TypeScript client.Establish testing practices (unit, component, and end-to-end) and the CI checks that enforce them.Later: build the supplier-panel app on the foundations you laid shared design system, auth, and API layer.Work alongside our web engineers (React/TypeScript); code review flows both ways.Desired Candidate ProfileExperience - 5+ years of software engineering, with 3+ years of React Native in production and strong TypeScript.Shipped and maintained - at least two apps live in both the App Store and Play Store maintained through OS releases, store policy changes, and at least one major React Native upgrade or architecture migration.Expo ecosystem - EAS Build / Submit / Update, config plugins, development builds, Continuous Native Generation.Native literacy - able to read and write basic Swift and Kotlin - enough to debug a native crash, write a config plugin, or wrap a native SDK.Navigation & deep linking - Expo Router or React Navigation; universal links / app links; push-notification routing.State & data - clear judgment on server state vs client state (e.g. TanStack Query + a light client store), and cart/checkout state design.Offline & caching - cache-first browsing, optimistic updates with rollback, queued mutations with sync and conflict handling.Push notifications - FCM + APNs end to end: permission UX, token lifecycle, payload design, all three app states.Performance - list virtualization, image pipelines, Hermes profiling, startup time, and re-render analysis on real devices.Testing - Jest + React Native Testing Library; E2E with Maestro or Detox; a coherent view of what to test at which layer.Release engineering - staged rollouts, OTA update policy and its store-policy boundaries, versioning, crash monitoring (Sentry or similar).Security - Keychain/Keystore for tokens (never AsyncStorage), secure deep-link handling, store privacy declarations.Nice to haveAI experience - Familiarity with AI-powered applications, LLM APIs (e.g. OpenAI), AI-assisted features such as chat, recommendations, semantic search, and prompt engineering. Experience integrating AI services into mobile applications is a strong advantage.E-commerce or B2B app experience; payment SDK integration (Stripe, Adyen, or similar).Monorepo experience (Turborepo/Nx or pnpm workspaces) sharing code with React web apps.Comfortable occasionally contributing to our React web codebases (Next.js storefront, Vite admin).Analytics and experimentation in mobile release cadences; App Store / Play Store review battle scars.Accessibility (VoiceOver/TalkBack), i18n/RTL (our storefront ships English, French, and Arabic).Able to read Python well enough to follow a FastAPI endpoint.React Native New Architecture migration experience.Our stack (context, not requirements)Storefront web: Next.js 16, React 19, TanStack Query, Tailwind, next-intl.Admin panel: Vite + React + TypeScript, shadcn/ui.Backend: FastAPI + PostgreSQL; OpenAPI contract with generated TypeScript clients.Mobile (yours): Expo SDK 57+, Expo Router, pnpm + Turborepo monorepo, EAS.

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